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37 lines
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37 lines
1.9 KiB
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<p>给你一个数组 <code>rectangles</code> ，其中 <code>rectangles[i] = [x<sub>i</sub>, y<sub>i</sub>, a<sub>i</sub>, b<sub>i</sub>]</code> 表示一个坐标轴平行的矩形。这个矩形的左下顶点是 <code>(x<sub>i</sub>, y<sub>i</sub>)</code> ，右上顶点是 <code>(a<sub>i</sub>, b<sub>i</sub>)</code> 。</p>
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<p>如果所有矩形一起精确覆盖了某个矩形区域，则返回 <code>true</code> ；否则，返回 <code>false</code> 。</p>
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<p><strong>示例 1：</strong></p>
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<img alt="" src="https://assets.leetcode.com/uploads/2021/03/27/perectrec1-plane.jpg" style="height: 294px; width: 300px;" />
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<pre>
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<strong>输入：</strong>rectangles = [[1,1,3,3],[3,1,4,2],[3,2,4,4],[1,3,2,4],[2,3,3,4]]
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<strong>输出：</strong>true
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<strong>解释：</strong>5 个矩形一起可以精确地覆盖一个矩形区域。
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</pre>
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<p><strong>示例 2：</strong></p>
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<img alt="" src="https://assets.leetcode.com/uploads/2021/03/27/perfectrec2-plane.jpg" style="height: 294px; width: 300px;" />
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<pre>
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<strong>输入：</strong>rectangles = [[1,1,2,3],[1,3,2,4],[3,1,4,2],[3,2,4,4]]
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<strong>输出：</strong>false
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<strong>解释：</strong>两个矩形之间有间隔，无法覆盖成一个矩形。</pre>
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<p><strong>示例 3：</strong></p>
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<img alt="" src="https://assets.leetcode.com/uploads/2021/03/27/perfecrrec4-plane.jpg" style="height: 294px; width: 300px;" />
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<pre>
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<strong>输入：</strong>rectangles = [[1,1,3,3],[3,1,4,2],[1,3,2,4],[2,2,4,4]]
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<strong>输出：</strong>false
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<strong>解释：</strong>因为中间有相交区域，虽然形成了矩形，但不是精确覆盖。</pre>
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<p> </p>
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<p><strong>提示：</strong></p>
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<ul>
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<li><code>1 <= rectangles.length <= 2 * 10<sup>4</sup></code></li>
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<li><code>rectangles[i].length == 4</code></li>
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<li><code>-10<sup>5</sup> <= x<sub>i</sub>, y<sub>i</sub>, a<sub>i</sub>, b<sub>i</sub> <= 10<sup>5</sup></code></li>
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</ul>
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